Preparation and characterization of photoluminescent praseodymium-doped ZrO₂nanostructured powders

Abstract

Praseodymium-doped ZrO 2 photoluminescent (PL) powders have been prepared by a co-precipitation process. Different doping concentrations in the start mixture and annealing temperatures for the precipitated were studied. It is observed that the crystalline structure and the crystallinity of the powders depend on the annealing temperature. For temperatures higher than 750˚C, the material presents the monoclinic phase with an average crystalline grain size of 100 nm. Measurements on photoluminescence show excitation and emission spectra. For an excitation wavelength of 294 nm, all the PL emission spectra show the peaks located at 490

Structural and optical properties of europium doped zirconia single crystals fibers grown by laser floating zone

“…These maxima were previously observed in polycrystalline YSZ and were attributed to the intraionic recombination of a lanthanide ion present as a contaminant in the samples. 35 As the peak position and spectral shape of the observed lines match those of the transition between the 1 D 2 and 3 H 4 multiplets of the Pr 3+ ion, 10,13,17,39 it is likely that in our as-grown samples praseodymium ions could be present as precursors contaminants. Actually, praseodymium doped tetragonal zirconia fibers were further produced and characterized, confirming the above assumption, as shown by the dashed line in Fig.…”

“…In fact, the visible and infrared transitions of several lanthanide ions in bulk, microstructured, and nanostructured zirconia polymorphs processed by different routes have been exploited by different research groups for potential applications as solid state lighting and displays. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Indeed, associated with the high energy bandgap, the low phonon energy resulting from the small stretching frequency ͑470 cm −1 ͒ exhibited by ZrO 2 foresees a high yield of the intra-4f n transitions from the RE doped zirconia, [14][15][16][21][22][23][24][25] a suitable host material for optical applications such as optical active waveguides.…”

Effect of fuels on conductivity, dielectric and humidity sensing properties of ZrO2 nanocrystals prepared by low temperature solution combustion method

“…The particles form the flake like structure and flakes are composed of interconnected pores of different size. The flake morphology of ZrO 2 is reported earlier by Ramos-Bristo et al [38] and Nayak et al [39]. However, for the sample ZrO 2 -2 the number of pores decreases and the flaky structure as seen in ZrO 2 -1 was not observed (Fig.…”

Preparation and luminescence properties of Tb3+ doped ZrO2 and BaZrO3 phosphors

“…There are few references of doping of ZrO 2 and BaZrO 3 lattices with Pr 3+ , Er 3+ , Eu 3+ and Sm 3+ ions in the literature [2,4,[10][11][12][13] but no work has come to the notice of the author regarding doping of Tb 3+ ions in ZrO 2 and BaZrO 3 .…”